%0 Journal Article %A K. O. Besov %T On the Nikol'skii Classes of Polyharmonic Functions %J Informatics and Automation %D 1999 %P 43-55 %V 227 %I mathdoc %U http://geodesic.mathdoc.fr/item/TRSPY_1999_227_a1/ %G ru %F TRSPY_1999_227_a1